Publishing industry leaders say successful authors and publishers build their book sales by having a strong author platform. What is an Author Platform? It is a combination of how you share your core message, what exactly is marketing message and who is listening to you. The larger the number and the depth of your personal relationships with your followers, the stronger your platform. This is what’s called “relationship marketing.” It is optimal to have a powerful platform before you launch your book, but it is never too late to begin building your platform. An author’s goal is to develop a funnel of…